Why STM32L432KC shows "BAD STATE MACHINE IN FIRMWARE In dfu mode?

[swapnil champaneria]

stm32l432kc shows bad state machine in firmware when tries to upgrade code in dfu mode using the same code with the same file.

[Tesla DeLorean]

Not an error state that I'm familiar with, would look at .HEX and .DFU involved. ​

[Tesla DeLorean]

Try STM32 Cube Programmer it also supports USB/DFU connectivity. ​

[swapnil champaneria]

Thanks for reply

I am facing same problem even if I generated file using the upload button in  the software and try to upgrade this file in stm32l432kc again, Any suggestion to solve this issue 

[swapnil champaneria]

@Community member​  Thanks for replay, In stm32 cube program my device not detected in dfu mode 

[Amel NASRI]

Try upgrading the ST-Link firmware first.

[swapnil champaneria]

Thanks for your reply @Amel NASRI​ , 

I upgraded ST-Link's firmware, but it still shows the same error as before.

Your reply will worthier to me.

Thanks and Regards,

Swapnil

[Amel NASRI]

My proposal is for the case when STM32CubeProgrammer is used. Is your device detected after updating the ST-Link firmware?

[Tesla DeLorean]

OP Attempting to connect in USB/DFU mode, NOT as ST-LINK

[Houda GHABRI]

​Hello @swapnil champaneria​ ,

Sorry for the late repons.

Could you plz try with last version of STM32CubeProgrammer :2.1.0.

Tested for my side and it is OK.

Please  let me know if you still have the same issue.

regards,

Houda

[DWalk.1]

I know this is an old thread, but I'm having the same issue. I believe my problem is with USB signal integrity. In my case, I changed layers on the USB traces on a 4-layer board with a ground and power plane. The return path for the USB signals has to find the nearest bypass capacitor which is 0.25" away. I may also need to monkey with my trace width to get closer to 90 Ohms (Right now I'm at 100 Ohms).